"TrueOS is a cutting-edge distribution of FreeBSD, combining the convenience and features of a rolling release distribution with the failsafe technology of ZFS boot environments.

TrueOS tracks the FreeBSD 'Current' branch and merges features from select developer branches to improve support for newer hardware and technologies. Weekly automatic updates keep the user's system up-to-date, and all updates are performed safely within system snapshots known as boot environments.

The desktop version of TrueOS uses the Lumina desktop environment alongside the new SysAdm administration suite to provide a reliable desktop experience. SysAdm provides local and remote management of TrueOS and FreeBSD systems using a cross-platform graphical client that is compatible with Windows, Mac, and many Linux distributions..."
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.. ZFS was originally designed at Sun Microsystem. It is an advanced file system and logical volume manager. It works on Solaris, FreeBSD, Linux and many other operating systems. The features of ZFS include protection against data corruption, compression, volume management, snapshots, data integrity, Software RAID, cache and much more.
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"Can this 30-year-old version of Unix help DigitalOcean and other cloud startups compete with the likes of Amazon?
DigitalOcean has started offering FreeBSD, an open source version of Unix, as an option on its cloud infrastructure. It is the second cloud supplier to do so, staking a spot in which smaller services can compete against Amazon and other giant cloud providers for customers, particularly developers.

FreeBSD is having a moment in the spotlight in certain circles, in part, because a few developers noticed that it's used to run the backend of WhatsApp, a mobile services platform acquired by Facebook in October 2014 at a final price that topped $21.8 billion..."
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ZFS is the world's most advanced filesystem, in active development for over a decade. Recent development has continued in the open, and OpenZFS is the new formal name for this open community of developers, users, and companies improving, using, and building on ZFS. Founded by members of the Linux, FreeBSD, Mac OS X, and illumos communities, including Matt Ahrens, one of the two original authors of ZFS, the OpenZFS community brings together over a hundred software developers from these platforms.